JPH10249751A - Coil spring compressing tool for automobile shock absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve the malfunction of a screw rod to be inclined during compressing a coil spring, smoothly rotated the screw rod and provide working safety by narrowing a space between hooks latched to the coil spring with the rotation of the screw rod. SOLUTION: A compressor has a screw rod 11 with a polygonal head 11b at one end, a nut 12 threaded to the screw rod 11 and a sleeve 13 fitted into the screw rod 11 to be rotatable relative to the screw rod 11 and supported by the head 11b. Hooks 15 are rotatably mounted on the nut 12 and the sleeve 13, respectively, to be latched to a coil spring 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression device for a coil spring of a vehicle shock absorber used for compressing a coil spring mounted on a shock absorber or the like.

[0002]

2. Description of the Related Art For example, when installing or removing a shock absorber for exchanging a coil spring mounted on the shock absorber, the coil spring is compressed in advance, and the shock absorber is spring-loaded by the coil spring. It needs to be released from action. Normally, the upper and lower ends of the coil spring are received by the spring body fixed to the cylinder body and piston rod of the shock absorber, respectively.To compress the coil spring, press the coil spring downward from the upper end side. Must.

When such a compression operation is performed, a hook 2 bent substantially in a U shape as shown in FIG.
a, 2b so that one hook 2a can move along the screw rod 1 with the hook 2a facing downward, and the other hook 2a
b is attached to the screw rod 1 via the nut body 3 and the sleeve body 4 so that the screw rod 1 can rotate relative to the screw rod 1 in the upward state. Turn the screw rod 1 to the upper hook 2
a is moved toward the lower hook 2b, and the coil springs 5 are equally compressed on both sides by using two compressors having a structure capable of compressing the coil springs 5 (one of the compressors is a virtual line). ).

[0004] The threaded rod 1 is provided with a male screw 1a except for the lower part. A nut 3 is screwed onto the male screw 1a, and a downward hook 2a is fixed to the nut 3 by welding. ing. A square or hexagonal head 1b at the lower end of the screw rod 1 receives a sleeve 4 fitted to the screw rod 1 so as to be able to rotate relative thereto. The hook 2b is fixed by welding. 6a is the cylinder body of the shock absorber, 6b is its piston rod, 7, 8
Is a spring catch.

[0005]

When the compression operation of the coil spring 5 is performed by using the above-mentioned conventional compression tool, the coil spring 5 is compressed by the two hooks 2a and 2b whose interval starts due to the rotation of the screw rod 1. Since the hooks 2a and 2b are inclined by the deformation of the coil spring 5, the screw bar 1 on which the hooks 2a and 2b are attached is also inclined. And
If the coil spring 5 is excessively compressed, both hooks 2a,
2b is excessively inclined and comes off the coil spring 5, and there is a danger that the screw rod 1 will be repelled by the strong elastic force of the coil spring 5.

When both hooks 2a and 2b are inclined,
The nut body 3 and the sleeve body 4 are also inclined, so that a natural force is applied to the screw thread in which the nut body 3 and the threaded bar 1 are engaged, and there is also a problem that a large operation force is required when rotating the threaded bar 1. is there. Therefore, an object of the present invention is to release the nut body and the sleeve body from the inclination of the hook caused by the deformation of the coil spring when the coil spring is compressed, thereby preventing the screw rod from being inclined with respect to the coil spring. It is another object of the present invention to provide a coil spring compression tool for an automobile shock absorber improved so that the screw rod can be smoothly rotated and work safety can be improved at the same time.

[0007]

In order to achieve the above object, a compressor for a coil spring of a vehicle shock absorber according to the present invention is characterized by comprising a threaded rod having one end formed on a polygonal head. A nut body screwed onto the threaded rod, and a sleeve body fitted on the threaded rod so as to be able to rotate relative to the threaded rod and supported by the head; Are configured so that hooks that can be engaged with the coil springs are rotatably mounted, and the upper hooks are moved toward the lower hooks by rotation of the screw rod, so that the coil springs can be compressed.

The nut and the sleeve are provided with support shafts protruding in a cantilevered state, and the two hooks having a substantially J-shaped cross section are attached to the support shaft on the back side. By doing so, it is rotatably supported by the nut body and the sleeve body, respectively. The head formed on the threaded rod functions as a fitting part of a tool used for rotating the threaded rod and a supporting part for receiving the sleeve body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 11 denotes a threaded rod, which is a male screw 11 except for a portion for fitting and supporting a sleeve body to be described later so as to be able to rotate relative to the threaded rod 11.
is provided, and one end of the screw rod 11 has a polygonal (square, hexagonal, etc.) head 11b for fitting a tool.
Is formed.

On the male screw 11a side of the screw rod 11, a nut body 12 is screwed (12a is a female screw), and on the head 11b side where the male screw 11a is not provided, a screw rod 11 is formed. A sleeve body 13 is fitted so as to be capable of relative rotation.
1b, and is received by the head 11b when the present compression tool is used. The nuts 12 and the sleeve 13 are provided with support shafts 14 and 14 in a cantilevered state, respectively. The support shafts 14 are welded to each other at the base portion 14a at the base 14a using the nut 12 and the sleeve 13. And are respectively integrally connected.

Hooks 15, 15 each having a substantially J-shaped cross section, are rotatably supported on both support shafts 14, and each support shaft 14 is inserted into the back surface 15a of the hook 15. I have. The support shaft 14 has a base portion 14a having a maximum diameter (for example, a diameter of 16 mm), and an intermediate portion (for example, a diameter of 12 mm) 14b and a tip portion (for example, a diameter of 10 m).
m) is formed in a paragraph shape by connecting 14c. on the other hand,
A back portion 15a of the hook 15 has an intermediate portion 14b of the support shaft 14.
A hole 15b and a concave portion 15c are formed to penetrate the front end portion 14c.

That is, the support shaft 1 is inserted into the hole 15b of the back surface 15a.
4 is loosely fitted, and the tip 14c is
5c, the distal end portion 14c is fitted to an annular retaining plate 16 loosely fitted into the concave portion 15c, and the retaining plate 16 and the distal end portion 14c are integrally joined by welding means. The hook 15 is rotatably supported by the support shaft 14. The screw rod 11, the nut body 12, the sleeve body 13, the support shaft 14, the hook 15, and the retaining plate 16 are all made of metal (iron).

According to this embodiment, since the hook 15 is rotatable with respect to the supports 12, 13, when the coil spring 17 indicated by the phantom line in FIG. Only the hook 16 rotates following the deformation. Therefore, the nut body 12 and the sleeve body 13 are no longer tilted, and the screw rod 11 is held substantially upright.

[0014]

As described above, the present invention is as described above. Since the hook rotates following the deformation of the coil spring, the hooking state with the coil spring is stable, and the threaded rod is largely inclined or disengages from the coil spring. Can be solved. Further, the screw rod and the nut body are held in a correct screwing state, so that the rotation operation of the screw rod can be performed smoothly, which is effective for ensuring the safety of the work, and has a great practical value.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention with a part cut away.

FIG. 2 is an exploded perspective view showing a relevant component of one (nut side) hook in FIG. 1;

FIG. 3 is a side view showing a usage state of a conventional coil spring compression tool.

[Explanation of symbols]

 11 is a screw rod 11b is a head 12 is a nut 13 is a sleeve 14 is a spindle 15 is a hook 17 is a coil spring

Claims (1)

[Claims] 1. A threaded rod having one end formed on a polygonal head, a nut body screwed onto the threaded rod, and the threaded rod being rotatable relative to the threaded rod. A sleeve body fitted and supported by the head, wherein a nut capable of engaging with the coil spring is rotatably attached to the nut body and the sleeve body, respectively. Compression tools.